Project files: Documentation from activities :{project management plan, scope,cost etc. these are from project activities}Project closure: will describe why the project is closed. customer acceptance--- this is mainly the documents which needs to finalized for closure or kill pointHistorical document: lessons learned from the project what went well how did u take care of an issue . how did u manage the stakeholder who was creating issues in the project.

To add to moreProject report -Project status reportProject records: what are the documents created from the activities like meetings, memo etc. This is may in line with project files.